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Stanislaus County, USA, Sheriff’s Department dive team slowly motored their boat along the concrete lined drainage canal, periodically stopping and lowering their scanning sonar to see what was beneath the muddy water.
They were searching for a 2003 Toyota Corolla belonging to alleged kidnapping suspect Jose Esteban Rodriguez.
They were using a variety of high tech equipment including ROVs and sonar systems. Teams spent ten days searching the 75-foot wide canal that was as deep as 50 feet in spots.
They located and removed sixteen vehicles, including a pickup truck and a motorcycle. Rodriguez’s car was among those found, but the windows were down and no one was inside. Officers are continuing the search, in an attempt to determine if bodies are somewhere in the 117 mile long waterway.
Mark Cardoza, a sheriff’s department diver, reported their JW Fishers SCAN-650 scanning sonar was instrumental in locating a number of the vehicles. The sonar operates in water similar to the way radar operates in air.It sweeps a circle up to 250 feet in diameter with a sound wave. The wave reflects off any object on the bottom and is received by the sonar transducer. The data is transmitted topside where a detailed image of any underwater object is displayed on a laptop computer. Cardoza remarked, “This sonar will now be the go-to technology to help us better utilise our limited bottom time.”
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